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WO2011048778A1 - Procédé de transmission sans fil, dispositif de transmission sans fil, système de transmission sans fil, programme et circuit intégré - Google Patents

Procédé de transmission sans fil, dispositif de transmission sans fil, système de transmission sans fil, programme et circuit intégré Download PDF

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Publication number
WO2011048778A1
WO2011048778A1 PCT/JP2010/006104 JP2010006104W WO2011048778A1 WO 2011048778 A1 WO2011048778 A1 WO 2011048778A1 JP 2010006104 W JP2010006104 W JP 2010006104W WO 2011048778 A1 WO2011048778 A1 WO 2011048778A1
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WO
WIPO (PCT)
Prior art keywords
wireless transmission
video
audio
data
wireless
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2010/006104
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English (en)
Japanese (ja)
Inventor
誠 船引
順二 吉田
哲也 佐藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Corp
Original Assignee
Panasonic Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Panasonic Corp filed Critical Panasonic Corp
Priority to JP2011537122A priority Critical patent/JP5560282B2/ja
Priority to US13/201,730 priority patent/US8365232B2/en
Publication of WO2011048778A1 publication Critical patent/WO2011048778A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
    • H04N21/4363—Adapting the video stream to a specific local network, e.g. a Bluetooth® network
    • H04N21/43637—Adapting the video stream to a specific local network, e.g. a Bluetooth® network involving a wireless protocol, e.g. Bluetooth, RF or wireless LAN [IEEE 802.11]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
    • H04N21/4341—Demultiplexing of audio and video streams
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
    • H04N21/4363—Adapting the video stream to a specific local network, e.g. a Bluetooth® network
    • H04N21/43632—Adapting the video stream to a specific local network, e.g. a Bluetooth® network involving a wired protocol, e.g. IEEE 1394
    • H04N21/43635—HDMI

Definitions

  • the present invention relates to a video / audio data wireless transmission method, and more particularly to a wireless transmission method for transmitting audio data from a video / audio output device such as a television set (TV) to an audio output device such as an AV amplifier. .
  • a video / audio output device such as a television set (TV)
  • an audio output device such as an AV amplifier.
  • Patent Document 1 Conventionally, there has been a method disclosed in Patent Document 1 as a method of wirelessly transmitting video data and audio data between a plurality of devices.
  • Patent Document 1 describes a method in which a video transmission apparatus connected to a source device that outputs content data selectively transmits content data output from the source device to a plurality of electronic devices by wireless signals.
  • the video transmission device detects functions of each of the plurality of electronic devices by wirelessly communicating with each of the plurality of electronic devices.
  • the video transmission apparatus classifies the plurality of electronic devices into a plurality of groups according to the detected functions of the plurality of electronic devices, and generates list information indicating a list of configurations of the plurality of groups. For example, a combination of an electronic device (such as a projector) that can be used for video display and an electronic device (such as an AV amplifier) that can be used for audio output, or a single electronic device (TV that can be used for both video display and audio output) Etc.).
  • an electronic device such as a projector
  • an electronic device such as an AV amplifier
  • the video transmission apparatus transmits the generated list information to the source device. And according to the selection information designating one of the plurality of groups output from the source device, the first electronic device to transmit the video data included in the content data from the plurality of electronic devices, and the content data The second electronic device that should transmit the audio data included in is identified.
  • the video transmission device converts the video data and audio data included in the content data into the specified first electronic device.
  • the data is transmitted to the device and the second electronic device by radio signals.
  • the video transmission apparatus converts the video data and audio data included in the content data into one electronic device. Is transmitted by radio signal.
  • video data is separately transmitted to the projector
  • audio data is separately transmitted to the AV amplifier
  • video data and audio data included in the content data are collectively transmitted to the TV. You can choose that.
  • the wireless band is shared between video data and audio data, and the wireless band is not sufficient to transmit both video data and audio data at the same time, and a wireless system that can transmit only one of video data and audio data.
  • it is necessary to switch the wireless connection between when video data is wirelessly transmitted from another device to the TV and when audio data is wirelessly transmitted from the TV to the AV amplifier.
  • the conventional method has a problem that the user must manually switch the wireless connection.
  • An object of the present invention is to solve the above problems and to provide a wireless transmission method of video / audio data capable of automatically switching between wireless connections.
  • a wireless transmission method includes a video output device that displays video based on at least video data, an audio output device that outputs audio based on audio data, and a wired connection to the video output device.
  • one of the first and second wireless transmission devices is executed.
  • the first and second A connection mode selection step of selecting a connection mode between the two wireless transmission devices and connecting in the selected connection mode.
  • the connection mode selection step when the source device exists on the second wireless transmission device side, the video data and the first wireless transmission device are moved from the second wireless transmission device to the first wireless transmission device.
  • the first wireless transmission apparatus Connection to the second wireless transmission device is performed in a second wireless connection form in which only the audio data of the video data and the audio data is wirelessly transmitted.
  • connection form between the first and second wireless transmission apparatuses is automatically selected according to the position of the source device.
  • the content can be reproduced without requiring the user to make complicated setting changes.
  • the device (video / audio playback device) connected to the video output device and the audio output device is not an essential component.
  • the “device connected to the video output device” is not only a device directly connected to the video output device, but also indirectly connected to the video output device with another device interposed therebetween. Including equipment. The same applies to the “device connected to the audio output device”.
  • the first wireless connection form You may connect with.
  • the first connection start condition is that (a) the wireless transmission system operates in a mode in which the video data is output from the video output device and the audio data is output from the audio output device. (B) the first wireless transmission device has a wired output function of the video data, and (c) the first wireless transmission device has a wireless reception function of the video data. And (d) at least one of the connection between the first wireless transmission device and the video output device may be included.
  • the second wireless You may connect with a connection form.
  • the second connection start condition is that (a) the wireless transmission system operates in a mode in which the video data is output from the video output device and the audio data is output from the audio output device. (B) the second wireless transmission device possesses a wired output function of the audio data, and (c) the second wireless transmission device possesses a wireless reception function of the audio data. And (d) at least one of the second wireless transmission device and the audio output device being connected may be included.
  • the location specifying message may be a CEC (Consumer Electronics Control) message defined in a High-Definition Multimedia Interface (HDMI) standard.
  • CEC Consumer Electronics Control
  • HDMI High-Definition Multimedia Interface
  • the location of the source device may be specified based on a CEC physical address included in the CEC message.
  • the CEC message may be a “Set Stream Path” message or an “Active Source” message.
  • the first and second wireless transmission devices comply with a wireless HD (High-Definition) standard, and use the HRP (High Rate PHY) when the first wireless connection form is selected.
  • Wireless transmission may be performed, and wireless transmission may be performed using LRP (Low Rate PHY) when the second wireless connection form is selected.
  • HRP High Rate PHY
  • uncompressed video data can be transmitted wirelessly.
  • audio data since audio data has a smaller data amount than video data, it can be sufficiently wirelessly transmitted even by LRP.
  • the first and second wireless transmission devices may wirelessly transmit the CEC message to each other using the LRP in a random access section assigned at predetermined time intervals. As a result, even when voice data is wirelessly transmitted using LRP, the connection form can be changed.
  • one of the first and second wireless connection forms is wirelessly connected, and the other of the first and second wireless connection forms is newly connected.
  • a disconnection step of disconnecting the current wireless connection may be included. Thereby, a connection form can be changed smoothly.
  • the wireless transmission method receives a signal indicating that a device connected to the wire itself is stopped while wirelessly connected in one of the first and second wireless connection modes.
  • a disconnecting step of disconnecting the wireless connection between the first and second wireless transmission devices may be included.
  • a wireless transmission device is connected to a video output device that displays video based on at least video data, an audio output device that outputs audio based on audio data, and a wired connection to the video output device.
  • the wireless transmission device is one of the first and second wireless transmission devices.
  • a receiving unit that receives a position specifying message indicating the position of the source device, and the other radio transmission apparatus based on the position of the source device indicated in the position specifying message received by the receiving unit
  • a connection form selection unit that selects a connection form between and the connection form selected by the selected connection form.
  • connection mode selection unit when the source device exists on the second wireless transmission device side, from the second wireless transmission device to the first wireless transmission device, the video data and
  • the first wireless transmission apparatus is connected in a first wireless connection mode for wirelessly transmitting at least the video data of the audio data, and the source device exists on the first wireless transmission apparatus side
  • the first wireless transmission apparatus Connection to the second wireless transmission device is performed in a second wireless connection form in which only the audio data of the video data and the audio data is wirelessly transmitted.
  • a wireless transmission system includes a video output device that displays video based on at least video data, an audio output device that outputs audio based on audio data, and a wired connection to the video output device.
  • one of the first and second wireless transmission devices includes a reception unit that receives a position specifying message that specifies a position of the source device, and the position received by the reception unit.
  • connection form selection unit that selects a connection form with the other wireless transmission device based on the position of the source device indicated in the specific message and connects with the selected connection form; Then, the connection mode selection unit, when the source device exists on the second wireless transmission device side, from the second wireless transmission device to the first wireless transmission device, the video data and When the first wireless transmission apparatus is connected in a first wireless connection mode for wirelessly transmitting at least the video data of the audio data, and the source device exists on the first wireless transmission apparatus side, the first wireless transmission apparatus Connection to the second wireless transmission device is performed in a second wireless connection form in which only the audio data of the video data and the audio data is wirelessly transmitted.
  • a program includes a video output device that displays video based on at least video data, an audio output device that outputs audio based on audio data, and a wired connection to the video output device.
  • An apparatus connected to the video output device comprising: a first wireless transmission device; and a second wireless transmission device that is wired to the audio output device and performs wireless transmission with the first wireless transmission device Wireless transmission in which any one of the device connected to the audio output device and the video output device itself becomes a source device for supplying the video data to the video output device and the audio data to the audio output device, respectively.
  • one of the first and second wireless transmission devices is executed.
  • the first and second A connection form between the two wireless transmission apparatuses is selected, and the wireless transmission apparatus is caused to execute a connection form selection step of connecting in the selected connection form.
  • the connection mode selection step when the source device exists on the second wireless transmission device side, the video data and the first wireless transmission device are moved from the second wireless transmission device to the first wireless transmission device.
  • the first wireless transmission apparatus Connection to the second wireless transmission device is performed in a second wireless connection form in which only the audio data of the video data and the audio data is wirelessly transmitted.
  • An integrated circuit is wired to the video output device that displays video based on at least video data, the audio output device that outputs audio based on audio data, and the video output device.
  • Any one of a device, a device connected to the audio output device, and the video output device itself is a radio serving as a source device that supplies the video data to the video output device and the audio data to the audio output device.
  • the transmission system is mounted on one of the first and second wireless transmission devices.
  • a receiving unit that receives a position specifying message indicating the position of the source device, and the other radio transmission apparatus based on the position of the source device indicated in the position specifying message received by the receiving unit
  • a connection form selection unit that selects a connection form between and the connection form selected by the selected connection form.
  • connection mode selection unit when the source device exists on the second wireless transmission device side, from the second wireless transmission device to the first wireless transmission device, the video data and
  • the first wireless transmission apparatus is connected in a first wireless connection mode for wirelessly transmitting at least the video data of the audio data, and the source device exists on the first wireless transmission apparatus side
  • the first wireless transmission apparatus Connection to the second wireless transmission device is performed in a second wireless connection form in which only the audio data of the video data and the audio data is wirelessly transmitted.
  • the wireless connection between the video / audio output device (TV) and the audio output device (AV amplifier) can be automatically switched.
  • FIG. 1 is a block diagram showing a configuration of a wireless communication system that transmits video / audio data using the video / audio data wireless transmission method according to the first embodiment of the present invention.
  • FIG. 2 is a block diagram illustrating a configuration example of the wireless transmission device 101 according to the first embodiment of the present invention.
  • FIG. 3 is a block diagram illustrating a configuration example of the wireless transmission apparatus 102 according to the first embodiment of the present invention.
  • FIG. 4 is a block diagram showing a configuration example of the audio output device 103 according to the first embodiment of the present invention.
  • FIG. 5 is a block diagram showing a configuration example of the video / audio reproduction devices 104 and 111 according to the first embodiment of the present invention.
  • FIG. 1 is a block diagram showing a configuration of a wireless communication system that transmits video / audio data using the video / audio data wireless transmission method according to the first embodiment of the present invention.
  • FIG. 2 is a block diagram illustrating a configuration example of the wireless transmission device 101 according to the
  • FIG. 6 is a block diagram showing a configuration example of the video / audio output device 108 according to the first embodiment of the present invention.
  • FIG. 7A is an example of a flowchart of connection processing performed by the wireless transmission device 101 according to the first embodiment of the present invention.
  • FIG. 7B is another example of a flowchart of connection processing performed by the wireless transmission device 101 according to the first embodiment of the present invention.
  • FIG. 8 is a diagram showing an example of the flow of video data and audio data output from the video / audio reproduction device 104 according to the first embodiment of the present invention.
  • FIG. 9 is a diagram showing an example of a sequence when video data and audio data are transmitted from the video / audio reproduction device 104 according to the first embodiment of the present invention.
  • FIG. 7A is an example of a flowchart of connection processing performed by the wireless transmission device 101 according to the first embodiment of the present invention.
  • FIG. 7B is another example of a flowchart of connection processing performed by the wireless transmission device 101 according to the first embodiment
  • FIG. 10 is a diagram showing an example of a sequence when video data and audio data are transmitted from the video / audio reproduction device 104 according to the first embodiment of the present invention.
  • FIG. 11 is a diagram showing an example of a sequence when video data and audio data are transmitted from the video / audio reproduction device 104 according to the first embodiment of the present invention.
  • FIG. 12 is a diagram illustrating an example of a sequence when video data and audio data are transmitted from the video / audio reproduction device 104 according to the first embodiment of the present invention.
  • FIG. 13 is a diagram illustrating an example of the flow of video data and audio data output from the video / audio output device 108 according to the first embodiment of the present invention.
  • FIG. 14 is a diagram showing an example of a sequence when video data and audio data are transmitted from the video / audio output device 108 according to the first embodiment of the present invention.
  • FIG. 15 is a diagram showing an example of a sequence when video data and audio data are transmitted from the video / audio output device 108 according to the first embodiment of the present invention.
  • FIG. 16 is a diagram showing an exemplary sequence when video data and audio data are transmitted from the video / audio output device 108 according to the first embodiment of the present invention.
  • FIG. 17 is a diagram showing an example of a sequence when video data and audio data are transmitted from the video / audio output device 108 according to the first embodiment of the present invention.
  • FIG. 15 is a diagram showing an example of a sequence when video data and audio data are transmitted from the video / audio output device 108 according to the first embodiment of the present invention.
  • FIG. 16 is a diagram showing an exemplary sequence when video data and audio data are transmitted from the video / audio output device 108 according to the first embodiment of
  • FIG. 18 is a diagram illustrating an example of the flow of video data and audio data output from the video / audio reproduction device 111 according to the first embodiment of the present invention.
  • FIG. 19 is a diagram showing an example of a sequence when video data and audio data are transmitted from the video / audio reproduction device 111 according to the first embodiment of the present invention.
  • FIG. 20 is a diagram showing an example of a sequence when video data and audio data are transmitted from the video / audio reproduction device 111 according to the first embodiment of the present invention.
  • FIG. 21 is a diagram illustrating an example of a sequence when video data and audio data are transmitted from the video / audio reproduction device 111 according to the first embodiment of the present invention.
  • FIG. 19 is a diagram illustrating an example of the flow of video data and audio data output from the video / audio reproduction device 111 according to the first embodiment of the present invention.
  • FIG. 19 is a diagram showing an example of a sequence when video data and audio data are transmitted from the video / audio reproduction device 111 according to the
  • FIG. 22 is a diagram illustrating an example of a sequence when video data and audio data are transmitted from the video / audio reproduction device 111 according to the first embodiment of the present invention.
  • FIG. 23 is a flowchart of disconnection processing performed by the wireless transmission device 101 according to the first embodiment of the present invention.
  • FIG. 24 is a diagram illustrating another example of the wireless communication system illustrated in FIG. 1.
  • FIG. 25 is a block diagram showing a configuration of a radio communication system that transmits audio data using the audio data radio transmission method according to the second embodiment of the present invention.
  • FIG. 26 is a block diagram showing a configuration example of the video / audio output device 701 according to the second embodiment of the present invention.
  • FIG. 27 is a flowchart of connection processing performed by the video / audio output device 701 according to the second embodiment of the present invention.
  • FIG. 28 is a diagram illustrating a sequence when the video / audio output device 701 according to the second embodiment of the present invention acquires device information of the wireless transmission device 102.
  • FIG. 29 is a diagram illustrating an example of a message format of a device information request signal according to the second embodiment of the present invention.
  • FIG. 30 is a diagram illustrating an example of a message format of a device information response signal according to the second embodiment of the present invention.
  • FIG. 31 is a flowchart of connection processing performed by the wireless transmission device 102 according to the second embodiment of the present invention.
  • FIG. 32 is a sequence diagram showing an operation example of the wireless communication system of FIG.
  • FIG. 33 is a flowchart of connection processing performed by the video / audio output device 701 according to the second embodiment of the present invention.
  • FIG. 34 is a block diagram showing a configuration example of a wireless communication system that transmits audio data using the audio data wireless transmission method according to the third embodiment of the present invention.
  • FIG. 1 is a block diagram showing a configuration example of a wireless transmission system that wirelessly transmits video data and audio data using the wireless transmission method according to the first embodiment of the present invention.
  • the wireless transmission system shown in FIG. 1 includes wireless transmission devices 101 and 102, an audio output device 103, video and audio playback devices 104 and 111, and a video and audio output device 108.
  • any of the video / audio reproduction devices 104 and 111 and the video / audio output device 108 can be a source device that is a source of video / audio data.
  • the video / audio reproduction device 111 is not an essential component and can be omitted.
  • the video / audio reproduction device 111 is a source device, the video / audio reproduction device 104 is not an essential component and can be omitted.
  • the video / audio output apparatus 108 is a source device, the video / audio reproduction apparatuses 104 and 111 are not essential components and can be omitted.
  • wireless transmission devices 101 and 102 are devices that can transmit and receive video data, audio data, and control commands to each other using wireless communication.
  • the audio output device 103 is a device that can output audio based on audio data.
  • a specific example of the audio output device 103 is not particularly limited, but is, for example, an AV (Audio / Visual) amplifier.
  • the video / audio reproduction devices 104 and 111 can reproduce the video data and the audio data, and supply them to other devices (for example, the audio data to the audio output device 103 and the video data to the video / audio output device 108).
  • Device for example, the audio data to the audio output device 103 and the video data to the video / audio output device 108.
  • Specific examples of the video / audio reproduction devices 104 and 111 are not particularly limited, and examples thereof include a BD (Blu-ray Disc) player and a DVD (Digital Versatile Disc) player.
  • the video / audio output device 108 is a device capable of displaying video based on video data and outputting audio based on the audio data.
  • the video / audio output device 108 receives a broadcast wave from a broadcast station (not shown), converts the video / audio data included in the broadcast wave to another device (for example, the video data to the video / audio output device 108 itself, It can be supplied to the audio output device 103).
  • a specific example of the video / audio output device 108 is not particularly limited, but is, for example, a TV (television).
  • a wireless transmission system according to another embodiment of the present invention is a video output device that can only output video, instead of the video / audio output device 108 of FIG. A projector) 113 may be provided. That is, it is sufficient that a device connected to the wireless transmission device 101 by wire is capable of outputting at least video.
  • the video / audio transmission cables 105, 106, 109, 112 are cables capable of transmitting video data and audio data such as an HDMI (High Definition Multimedia Interface) cable.
  • the audio transmission cables 107 and 110 are cables capable of transmitting audio data such as an SPDIF (Sony Philips Digital Interface) cable.
  • the video / audio reproduction device 104 and the audio output device 103 are connected by a video / audio transmission cable 105, and both video data and audio data are transmitted from the video / audio reproduction device 104 to the audio output device 103 in one direction. Can be transmitted in the same direction.
  • the audio output device 103 and the wireless transmission device 102 are wired by a video / audio transmission cable 106, and video data and audio data are transmitted from the audio output device 103 to the wireless transmission device 102 in one direction, and control commands are transmitted bidirectionally. Can be transmitted. Also, the audio output device 103 and the wireless transmission device 102 are wired by an audio transmission cable 107, and audio data can be transmitted from the wireless transmission device 102 in one direction of the audio output device 103.
  • the wireless transmission devices 101 and 102 perform wireless transmission by a method compliant with, for example, wireless HD (High-Definition). Specifically, radio transmission is performed by switching between HRP (High Rate PHY) and LRP (Low Rate PHY) as necessary.
  • the HRP has a band of 4.0 G (bps) and can perform wireless transmission only in one direction (direction from the wireless transmission device 102 to the wireless transmission device 101).
  • mainly uncompressed video data and audio data are wirelessly transmitted using HRP.
  • the LRP has a bandwidth of 40 M (bps) and can perform two-way wireless transmission.
  • mainly control commands such as voice data and CEC (Consumer Electronics Control) messages are wirelessly transmitted.
  • the wireless transmission device 101 and the video / audio output device 108 are connected by a video / audio transmission cable 109, and both video data and audio data are transmitted from the wireless transmission device 101 to the video / audio output device 108 in one direction. Can be transmitted in the same direction.
  • the wireless transmission apparatus 102 and the video / audio output apparatus 108 are wired by an audio transmission cable 110, and audio data can be transmitted from the video / audio output apparatus 108 to the wireless transmission apparatus 101 in one direction.
  • the video / audio output device 108 and the video / audio reproduction device 111 are connected to each other by a video / audio transmission cable 112, and control data is transmitted from the video / audio reproduction device 111 to the video / audio output device 108 in one direction. Can be transmitted in both directions.
  • the wireless transmission system shown in FIG. 1 has two output forms (theater mode and normal mode).
  • theater mode video is displayed by the video / audio output device 108, and audio is output from the audio output device 103.
  • In the normal mode video is displayed on the video / audio output device 108 and audio is also output from a built-in speaker.
  • This switching of the output mode may be set manually for each device, or when manually set for one device, the manually set device may notify another device.
  • the wireless transmission system shown in FIG. 24 always displays video on the video output device 113 and outputs audio from the audio output device 103 (that is, theater mode only).
  • the CEC physical address (hereinafter simply referred to as “physical address”) defined by HDMI is assigned to the video / audio output device 108, the audio output device 103, and the video / audio reproduction devices 104 and 111.
  • a physical address [0.0.0.0] is assigned to the video / audio output device 108, and a physical address [1.0.0.] Is assigned to the audio output device 103 connected to the input side of the video / audio output device 108. 0] and a physical address [2.0.0.0] is assigned to the audio / video reproduction apparatus 111 connected to the input side of the audio / video output apparatus 108 and connected to the input side of the audio output apparatus 103.
  • the physical address [1.1.0.0] is assigned to the video / audio reproduction device 104 that is configured. Note that the physical address assignment shown in the first embodiment is an example, and different physical addresses may be assigned to each device depending on the connection method of the device. Even in this case, the first embodiment It is possible to perform the same processing as shown in FIG.
  • FIG. 2 is a block diagram illustrating a configuration example of the wireless transmission device 101 according to the first embodiment of the present invention.
  • a wireless transmission device 101 has a packet wireless transmission / reception circuit 202 having an antenna 206, a packet processing circuit 203, a wired transmission / reception circuit 204 having a transmission function of video data and audio data, and a reception function of audio data. And a controller 201 that controls operations of these circuits 202 to 205 and the like.
  • the antenna 206 outputs a carrier wave signal wirelessly received from the wireless transmission device 102 to the packet wireless transmission / reception circuit 202.
  • the carrier wave signal input from the packet wireless transmission / reception circuit 202 is wirelessly transmitted to the wireless transmission device 102.
  • the packet radio transmission / reception circuit 202 demodulates the carrier wave signal received via the antenna 206 into a baseband signal and outputs it to the packet processing circuit 203.
  • the baseband signal input from the packet processing circuit 203 is modulated into a carrier wave signal and output to the antenna 206.
  • the packet processing circuit 203 decodes the received packet by extracting only video data, audio data, and a predetermined control command from the baseband signal input from the packet radio transmission / reception circuit 202 by a predetermined packet separation process.
  • the video data and audio data are output to the wired transmission / reception circuit 204, and the control command is output to the controller 201.
  • the audio data input from the audio wired receiving circuit 205 or the control command input from the controller 201 is converted into a digital signal in a predetermined packet format and output to the packet radio transmission / reception circuit 202.
  • the wired transmission / reception circuit 204 receives video / audio data or only video data from the wireless transmission apparatus 102 via the antenna 206, the packet wireless transmission / reception circuit 202, and the packet processing circuit 203, and transmits it to the video / audio transmission cable 109.
  • the data format is converted and output to the video / audio transmission cable 109.
  • the wired transmission / reception circuit 204 relays a CEC message between the video / audio output device 108 and the controller 201 using the CEC signal line of the video / audio transmission cable 109.
  • the audio wired receiving circuit 205 outputs the audio data received from the video / audio output device 108 via the audio transmission cable 110 to the packet processing circuit 203.
  • the controller 201 When the wireless signal is received via the antenna 206 and when the voice data is received by the voice wired reception circuit 205, the controller 201 receives the packet wireless transmission / reception circuit 202, the packet processing circuit 203, the wired transmission / reception circuit 204, the voice wired Control data is exchanged with the receiving circuit 205, and each control is performed.
  • the controller 201 transmits and receives control commands to and from the wireless transmission apparatus 102 via the antenna 206, the packet wireless transmission / reception circuit 202, and the packet processing circuit 203. Further, the controller 201 transmits / receives control commands to / from the audio / video output device 108 via the wired transmission / reception circuit 204.
  • the antenna 206, the packet wireless transmission / reception circuit 202, the packet processing circuit 203, and the wired transmission / reception circuit 204 function as a receiving unit that receives a CEC message as a control command. Further, the controller 201 functions as a connection mode selection unit that selects the connection mode of the wireless transmission apparatuses 101 and 102 based on the CEC message received by the reception unit and connects the two in the selected connection mode. Details of these functions will be described later.
  • FIG. 3 is a block diagram illustrating a configuration example of the wireless transmission device 102 according to the first embodiment of the present invention.
  • a wireless transmission device 102 has a packet wireless transmission / reception circuit 302 provided with an antenna 306, a packet processing circuit 303, a wired transmission / reception circuit 304 having a reception function of video data and audio data, and a transmission function of audio data. And a controller 301 that controls the operation of these circuits 302 to 305.
  • the wired transmission / reception circuit 304 outputs the video data and audio data received from the audio output device 103 via the video / audio transmission cable 106 to the packet processing circuit 303.
  • the wired transmission / reception circuit 304 relays a CEC message between the audio output device 103 and the controller 301 using the CEC signal line of the video / audio transmission cable 106.
  • the packet processing circuit 303 converts the video data and audio data input from the wired transmission / reception circuit 304 into a digital signal in a predetermined packet format, and outputs the digital signal to the packet wireless transmission / reception circuit 302. Further, the packet processing circuit 303 extracts only a predetermined control command from the baseband signal input from the packet radio transmission / reception circuit 302 by a predetermined packet separation process, and then outputs it to the controller 301. Further, when the input baseband signal includes audio data, the audio data is output to the audio wired transmission circuit 305.
  • the packet radio transmission / reception circuit 302 modulates the baseband signal input from the packet processing circuit 303 into a carrier wave signal, and wirelessly transmits the modulated radio signal to the radio transmission apparatus 101 via the antenna 306. Further, the packet radio transmission / reception circuit 302 demodulates the carrier wave signal received from the radio transmission apparatus 101 via the antenna 306 into a baseband signal and outputs it to the packet processing circuit 303.
  • the audio wired transmission circuit 305 outputs the audio data input from the packet processing circuit 303 to the audio output device 103 via the audio transmission cable 107.
  • the controller 301 exchanges control data with the wired transmission / reception circuit 304, the packet processing circuit 303, the packet wireless transmission / reception circuit 302, and the voice wired transmission circuit 305, and performs respective controls.
  • FIG. 4 is a block diagram showing a configuration example of the audio output device 103 according to the first embodiment of the present invention.
  • an audio output device 103 includes a wired transmission / reception circuit 402 having a video data and audio data reception function, a video / audio processing circuit 403, a wired transmission / reception circuit 404 having a video data and audio data transmission function, and an audio.
  • a wired audio receiving circuit 405 having a data receiving function, a speaker 406, and a controller 401 for controlling the operation of these circuits and the like 402 to 405 are configured.
  • the wired transmission / reception circuit 402 outputs the video data and audio data received from the video / audio reproduction device 104 via the video / audio transmission cable 105 to the video / audio processing circuit 403.
  • the wired transmission / reception circuit 402 relays a CEC message between the video / audio reproduction device 104 and the controller 401 using the CEC signal line of the video / audio transmission cable 105.
  • the wired transmission / reception circuit 404 converts the video / audio data or video data input from the video / audio processing circuit 403 into a predetermined data format, and outputs the data to the wireless transmission apparatus 102 via the video / audio transmission cable 106.
  • the wired transmission / reception circuit 404 relays a CEC message between the wireless transmission apparatus 102 and the controller 401 using the CEC signal line of the video / audio transmission cable 106.
  • the video / audio processing circuit 403 performs predetermined signal processing and D / A conversion processing on the audio data input from the wired transmission / reception circuit 402 or the audio wired reception circuit 405 according to an instruction from the controller 401. Output to the speaker 406.
  • the video data input from the wired transmission / reception circuit 402 is output to the wired transmission / reception circuit 404.
  • the video / audio processing circuit 403 outputs video data and audio data input from the wired transmission / reception circuit 402 to the wired transmission / reception circuit 404 in accordance with an instruction from the controller 401 in the normal mode.
  • the audio wired reception circuit 405 outputs the audio data received from the wireless transmission apparatus 102 via the audio transmission cable 107 to the video / audio processing circuit 403.
  • the video / audio processing circuit 403 performs predetermined signal processing and D / A conversion processing on the input audio data in accordance with an instruction from the controller 401 in the theater mode, and then outputs the processed audio data to the speaker 406.
  • the video / audio processing circuit 403 discards input audio data in accordance with an instruction from the controller 401 in the normal mode.
  • the controller 401 exchanges control data with the wired transmission / reception circuit 402, the video / audio processing circuit 403, the wired transmission / reception circuit 404, and the audio wired reception circuit 405, and performs control of each.
  • FIG. 5 is a block diagram showing a configuration example of the video / audio reproduction device 104 according to the first embodiment of the present invention.
  • the video / audio reproduction device 104 includes a video / audio reproduction circuit 502, a video / audio processing circuit 503, a wired transmission / reception circuit 504 having a transmission function of video data and audio data, and operations of these circuits 502-504. And a controller 501 for controlling the above.
  • the video / audio reproduction circuit 502 is, for example, a DVD drive, and reproduces video data and audio data from a recording medium such as a DVD and outputs the data to the video / audio processing circuit 503.
  • the video / audio processing circuit 503 performs predetermined signal processing on the video data and audio data input from the video / audio reproduction circuit 502, and then outputs them to the wired transmission / reception circuit 504.
  • the wired transmission / reception circuit 504 converts the video data and audio data input from the video / audio processing circuit 503 into a data format for transmission to the video / audio transmission cable 105 and outputs the data to the video / audio transmission cable 105.
  • the wired transmission / reception circuit 404 relays a CEC message between the audio output device 103 and the controller 501 using the CEC signal line of the video / audio transmission cable 105.
  • the controller 501 exchanges control data with the video / audio reproduction circuit 502, the video / audio processing circuit 503, and the wired transmission / reception circuit 504, and performs respective controls.
  • the video / audio reproduction device 111 is the same as the configuration of the video / audio reproduction device 104 except that it is wired to the video / audio output device 108 via the video / audio transmission cable 112, and thus the description thereof is omitted. .
  • FIG. 6 is a block diagram showing the configuration of the video / audio output device 108 according to the first embodiment of the present invention.
  • the video / audio output device 108 includes a wired transmission / reception circuit 602 having a video data and audio data reception function, an audio wired transmission circuit 603 having a transmission function of audio data, a video / audio processing circuit 604, and a speaker 605. And a display 606, a broadcast wave receiving circuit 607, and a controller 601 for controlling the operation of these circuits 602 to 604 and 607. 24 is different from the video / audio output device 108 in that the video output device 113 does not have the speaker 605, and other components are common to the video / audio output device 108.
  • the wired transmission / reception circuit 602 outputs video / audio data or video data received from the wireless transmission device 101 via the video / audio transmission cable 109 to the video / audio processing circuit 604. Also, the video data and audio data received from the video / audio reproduction device 111 via the video / audio transmission cable 112 are output to the video / audio processing circuit 604. The wired transmission / reception circuit 602 relays a CEC message between the wireless transmission apparatus 101 and the controller 601 using the CEC signal line of the video / audio transmission cable 109. Further, the wired transmission / reception circuit 602 relays the CEC message between the video / audio reproduction device 111 and the controller 601 using the CEC signal line of the video / audio transmission cable 112.
  • the video / audio processing circuit 604 performs predetermined signal processing and D / A conversion processing on the video data input from the wired transmission / reception circuit 602, and then outputs and displays the video data on the display 606.
  • the video / audio processing circuit 604 performs predetermined signal processing and D / A conversion processing on the audio data input from the wired transmission / reception circuit 602, and then outputs the audio data to the speaker 605 and the audio wired transmission circuit.
  • the video / audio processing circuit 604 does not output the audio data input from the wired transmission / reception circuit 602 to the speaker 605 but outputs it to the audio wired transmission circuit 603.
  • the video / audio processing circuit 604 of the video output device 113 always outputs audio data to the audio wired transmission circuit 603.
  • the audio wired transmission circuit 603 outputs the audio data input from the video / audio processing circuit 604 to the wireless transmission device 101 via the audio transmission cable 110.
  • the controller 601 exchanges control data with the wired transmission / reception circuit 602, the audio wired transmission circuit 603, the video / audio processing circuit 604, and the broadcast wave reception circuit 607, and performs respective controls.
  • the broadcast wave receiving circuit 607 receives the broadcast wave and outputs video data and audio data obtained by executing predetermined signal processing to the video / audio processing circuit 604.
  • a broadcast wave is not specifically limited, All broadcast waves, such as an analog broadcast, terrestrial digital broadcast, BS (Broadcast Satellite) broadcast, CS (Communication Satellite) broadcast, can be received.
  • the broadcast wave receiving circuit 607 is not an essential component of the video / audio output device 108 and the video output device 113 and can be omitted.
  • the video / audio processing circuit 604 outputs the video data to the display 606 for display after executing predetermined signal processing and D / A conversion processing.
  • the video / audio processing circuit 604 performs predetermined signal processing and D / A conversion processing on the input audio data, and then outputs the audio data to the speaker 605 and to the audio wired transmission circuit 603.
  • the audio / video processing circuit 604 does not output audio to the speaker 605 but outputs audio data to the audio wired transmission circuit 603.
  • Each of the circuits shown in FIGS. 2 to 6 can be replaced with a processing unit that realizes part or all of the processing of the circuit by a program.
  • FIG. 7A is a diagram illustrating an example of a flowchart of processing of the controller 201 of the wireless transmission device 101 that functions as a connection form selection unit.
  • the controller 201 acquires the state of the HPD (Hot Plug Detect) signal line of the video / audio transmission cable 109 from the wired transmission / reception circuit 204 (S701).
  • the controller 201 determines that the video / audio output device 108 is in a stopped state and completes the process.
  • the controller 201 determines that the video / audio output device 108 is in an operating state and waits until a CEC message is received (S702).
  • the wireless transmission device 102 determines whether or not the audio output device 103 is operating. At this time, the controller 301 of the wireless transmission apparatus 102 makes a determination by acquiring the signal level of the “+5 V POWER” signal line of the video / audio transmission cable 106 from the wired transmission / reception circuit 304.
  • the controller 201 when the controller 201 receives a CEC message via the antenna 206, the packet wireless transmission / reception circuit 202, and the packet processing circuit 203 or via the wired transmission / reception circuit 204 (S702), the controller 201 By referring to the operation code, it is confirmed whether or not the message type of the received CEC message is either a “Set Stream Path” message or an “Active Source” message (S703).
  • the “Set Stream Path” message and the “Active Source” message are given as examples of the location specification message. However, the message is not limited to this, and any message that can specify the location of the source device is substituted. be able to.
  • the controller 201 confirms the physical address included in the operand area of the received message (S704).
  • the physical address included in the operand area of the CEC message is the physical address of the source device that outputs video data and audio data.
  • the controller 201 When the physical address is a physical address indicating that the device is connected to the input side (hereinafter referred to as “upstream”) of the wireless transmission device 102 (Yes in S704), the controller 201 performs forward connection processing. (S706). On the other hand, when the physical address is not a physical address indicating that the device is connected to the upstream side of the wireless transmission device 102 (No in S704), the controller 201 performs reverse connection processing (S705).
  • the “forward connection” is a first that performs wireless transmission using HRP from the wireless transmission apparatus 102 to the wireless transmission apparatus 101 when the source device exists on the input side of the wireless transmission apparatus 102.
  • Data transmitted wirelessly at this time is both video data and audio data (normal mode), or only video data (theater mode).
  • the “reverse connection” is a second method for performing wireless transmission using LRP from the wireless transmission apparatus 101 to the wireless transmission apparatus 102 when the source device exists on the input side of the wireless transmission apparatus 101.
  • the data wirelessly transmitted is only audio data (both normal mode and theater mode).
  • the audio output device 103 with the physical address [1.0.0.0] and the physical address [1.1.0.0] A video / audio reproduction device 104 is connected. That is, the controller 201 determines that the physical address set in the operand area of the received CEC message is [1. x. x. x] (x is a natural number).
  • the physical address [0.0.0.0] is assigned to the video / audio output device 108 as the root device by default.
  • the wireless transmission device 101 connected to the wired transmission / reception circuit 602 of the video / audio output device 108 via the video / audio transmission cable 109 is connected to the EDID (Extended Display Identification Data: display unit setting information) of the video / audio output device 108.
  • the wireless transmission device 101 can detect the physical address [1.0.0.0] assigned to the device connected to the wired transmission / reception circuit 602.
  • the wireless transmission device 101 stores the read EDID in the controller 201 and wirelessly transmits it to the wireless transmission device 102.
  • the wireless transmission device 102 sets a physical address included in the EDID received from the wireless transmission device 101 in its own EDID.
  • the physical address [1.0.0.0] is set in the audio output device 103 connected to the input side of the wireless transmission device 102.
  • the physical address [1.1.0.0] is set in the video / audio reproduction device 104 connected to the audio output device 103 in accordance with a conventional allocation method.
  • the wireless transmission device 101 is a device in which the physical address is connected upstream of the wireless transmission device 102 by performing the same processing for other physical addresses. It is possible to determine whether or not it has been assigned.
  • “input side” and “upstream” refer to the side to which the HDMI source device is connected.
  • the audio output device 103 and the video / audio reproduction device 104 function as source devices for the wireless transmission device 102. Therefore, the audio output device 103 and the video / audio reproduction device 104 are connected to the input side (or upstream) of the wireless transmission device 102.
  • the wireless transmission device 101 and the video / audio reproduction device 111 function as source devices for the video / audio output device 108. Accordingly, the wireless transmission device 101 and the video / audio reproduction device 111 are connected to the input side (or upstream) of the video / audio output device 108.
  • output side and downstream refer to the side to which the HDMI sink device is connected.
  • FIG. 7B is a diagram illustrating another example of a flowchart of processing of the controller 201 of the wireless transmission device 101 that functions as a connection form selection unit.
  • the difference from the flowchart shown in FIG. 7A is that a process (S707) for determining whether or not the connection start condition is satisfied is added between S703 and S704.
  • S707 a process for determining whether or not the connection start condition is satisfied.
  • the controller 201 confirms the connection start condition (S707). Then, when all the connection start conditions are satisfied (Yes in S707), the controller 201 executes processing (S704) for confirming the physical address included in the operand area of the received message. On the other hand, when even one connection start condition is not satisfied (No in S707), the subsequent processing is skipped.
  • connection start condition may be different depending on the direction of data transmission / reception (forward connection or reverse connection) between the wireless transmission apparatuses 101 and 102.
  • connection start condition determination process (S707) shown in FIG. 7B may be executed between S704 and S705 or S706.
  • FIG. 8 is a diagram showing the flow of video data and audio data when the content reproduced by the video / audio reproduction device 104 is viewed in the theater mode.
  • FIG. 9 to FIG. 12 are diagrams showing the processing sequence of each device constituting the wireless transmission system.
  • the video data output from the video / audio reproduction device 104 is output from the display 606 of the video / audio output device 108 via the audio output device 103, the wireless transmission device 102, and the wireless transmission device 101. Is done.
  • the audio data output from the video / audio reproduction device 104 is output from the speaker 406 of the audio output device 103.
  • the video / audio reproduction device 104 sets the physical address [1.1.0.0] of the video / audio reproduction device 104 in the operand area. Broadcast the “Active Source” message. Alternatively, the video / audio output device 108 broadcasts a “Set Stream Path” message in which the physical address [1.1.0.0] of the video / audio reproduction device 104 is set in the operand area. Processing for performing forward connection using these CEC messages will be described with reference to FIGS.
  • FIG. 9 shows an example of a sequence in the case where a “Set Stream Path” message is transmitted from the video / audio output device 108.
  • the “Set Stream Path” message is a CEC message indicating that the device identified by the physical address set in the operand area is the source device.
  • the CEC message may be transmitted by the source device itself (in this example, the video / audio reproduction device 104), or may be transmitted by another device that is not the source device (in this example, the video / audio output device 108). .
  • the wired transmission / reception circuit 602 of the video / audio output device 108 transmits a “Set Stream Path” message to the CEC signal lines of the video / audio transmission cables 109 and 112.
  • the physical address [1.1.0.0] of the video / audio reproduction device 104 serving as the source device is set.
  • the wired transmission / reception circuit 204 of the wireless transmission device 101 receives this CEC message and outputs it to the controller 201.
  • the controller 201 transmits the CEC message input from the wired transmission / reception circuit 204 to the wireless transmission apparatus 102 via the packet processing circuit 203, the packet wireless transmission / reception circuit 202, and the antenna 206.
  • the CEC message is relayed by the wireless transmission device 102 and the audio output device 103 and reaches the video / audio reproduction device 104.
  • the controller 201 refers to the physical address [1.1.0.0] included in the CEC message input from the wired transmission / reception circuit 204, and is the physical address of the device connected upstream of the wireless transmission device 102. Recognize that.
  • the controller 201 of the wireless transmission device 101 may confirm whether or not the connection start condition is satisfied.
  • the following connection start conditions (a1) to (d1) may be determined.
  • the connection start conditions (a1) to (d1) can be commonly used in the examples shown in FIGS.
  • the wireless transmission device 101 has a wired output function for video data.
  • the wireless transmission device 101 has a wireless reception function for video data.
  • the controller 201 of the wireless transmission apparatus 101 exchanges control signals with the controller 401 of the audio output apparatus 103 and / or the controller 601 of the video / audio output apparatus 108, and in the theater mode. This is done by determining whether to operate or to operate in normal mode.
  • the controller 601 of the video / audio output device 108 stores whether the current operation mode is the theater mode or the normal mode. For example, the operation mode is set by the user.
  • the controller 201 of the wireless transmission apparatus 101 acquires the operation mode from the controller 601 of the video / audio output apparatus 108.
  • the transmission status information indicated by (b1) to (d1) can be determined from the information held by the wireless transmission device 101 itself, and thus detailed description thereof is omitted.
  • the controller 201 proceeds to a process of establishing a wireless connection with the wireless transmission apparatus 102 when all the four connection start conditions (a1) to (d1) are satisfied. On the other hand, if any one of the four connection start conditions (a1) to (d1) is not satisfied, the controller 201 completes the process without starting the wireless connection with the wireless transmission device 102. At this time, the controller 201 may transmit the cause of not starting the wireless connection to the video / audio output device 108 and notify the user via the display 606 or the speaker 605 of the video / audio output device 108. For example, if (d1) is not satisfied, a message such as “The video cable is not connected.” Or “Please connect the video cable to the display.” Is displayed on the display 606, or the speaker. Notification is made by voice through 605.
  • the controller 201 transmits a connection request for establishing a forward connection to the wireless transmission device 102 using LRP. That is, the controller 201 functioning as a connection form selection unit selects the first connection form.
  • the wireless transmission device 102 When the wireless transmission device 102 receives a connection request from the wireless transmission device 102, the wireless transmission device 102 transmits a connection response permitting the connection to the wireless transmission device 101 using LRP. Further, the wireless transmission apparatus 102 reserves a wireless band (HRP) for transmitting video data. Thereafter, a stream start notification indicating that the video data stream transmission is started is transmitted to the wireless transmission apparatus 101 using the LRP.
  • HRP wireless band
  • the video data output from the video / audio reproduction device 104 is transmitted to the video / audio output device 108 via the wirelessly connected forward connection.
  • the above description is based on the assumption of “theater mode”
  • the same processing is performed in the “normal mode” except that both video data and audio data are transmitted wirelessly using a reserved wireless band. Is executed.
  • FIGS. 28 illustrates an example in which a device information request signal is transmitted from the wireless transmission apparatus 101 side and a device information response signal is transmitted from the wireless transmission apparatus 102 side.
  • the signal transmission direction is The reverse direction.
  • the bandwidth reservation and the stream start notification are transmitted by the data transmission side, that is, by the wireless transmission device 102 in the case of forward connection and by the wireless transmission device 101 in the case of backward connection. The same applies to the subsequent sequences.
  • FIG. 10 shows an example of a sequence for newly establishing a forward connection when a reverse connection for transmitting voice data has already been established.
  • the content received by the broadcast wave receiving circuit 607 of the video / audio output device 108 is viewed in the theater mode
  • the content of the DVD inserted in the video / audio playback device 104 is viewed in the theater mode. Can happen if you start to do.
  • a detailed description of the common points with the sequence already described will be omitted, and the differences will be described in detail.
  • a wireless band (LRP) for transmitting audio data is reserved between the wireless transmission devices 101 and 102, and audio data is transmitted from the video / audio output device 108 to the audio output device 103.
  • LRP wireless band
  • the audio / video output device 108 sets “Set Stream Path” in which the physical address [1.1.0.0] is set. Send a message.
  • the wireless transmission device 101 relays the CEC message received from the video / audio output device 108 to the wireless transmission device 102, and refers to the physical address [1.1.0.0] included in the CEC message. It recognizes that it is the physical address of the device connected upstream of 102.
  • the wireless transmission device 101 transmits a disconnection notification for disconnecting the established reverse connection to the wireless transmission device 102 using LRP.
  • control commands CEC messages, connection requests, connection responses, disconnection notifications, stream start notifications, etc.
  • transmission / reception is performed using LRP, transmission / reception is possible even when voice data is transmitted using LRP as shown in FIG. The same applies to other examples.
  • the wireless transmission device 101 transmits a connection request for establishing a forward connection to the wireless transmission device 102 after performing a bandwidth release process for releasing the reserved bandwidth.
  • the wireless transmission device 102 that has received the connection request transmits a connection response permitting connection to the wireless transmission device 101.
  • the wireless transmission apparatus 102 reserves a wireless band (HRP) for transmitting video data. Thereafter, the wireless transmission device 102 transmits a stream start notification indicating that the video data stream transmission is started to the wireless transmission device 101.
  • HRP wireless band
  • the video data output from the video / audio reproduction device 104 is transmitted to the video / audio output device 108 via the wirelessly connected forward connection.
  • the wireless transmission apparatus 102 may transmit a cutting request.
  • the bandwidth release processing is executed by the data transmission side, that is, the wireless transmission device 102 in the case of forward connection and the wireless transmission device 101 in the case of backward connection. The same applies to the subsequent sequences.
  • FIG. 11 shows an example of a sequence in a case where an “Active Source” message is transmitted from the video / audio reproduction device 104.
  • the “Active Source” message is a CEC message indicating that the device identified by the physical address set in the operand area is the source device. This CEC message is transmitted by the source device itself (in this example, the video / audio reproduction device 104).
  • the wired transmission / reception circuit 504 of the video / audio reproduction device 104 transmits an “Active Source” message to the CEC signal line of the video / audio transmission cable 105.
  • the physical address [1.1.0.0] of the video / audio reproduction device 104 serving as the source device is set.
  • the CEC message is relayed by the audio output device 103 and the wireless transmission device 102 and reaches the wireless transmission device 101.
  • the antenna 206 of the wireless transmission device 101 receives this CEC message and outputs it to the controller 201 via the packet wireless transmission / reception circuit 202 and the packet processing circuit 203.
  • the controller 201 transmits the CEC message input from the packet processing circuit 203 to the video / audio output device 108 via the wired transmission / reception circuit 204.
  • the CEC message is relayed by the video / audio output device 108 and reaches the video / audio reproduction device 111.
  • the controller 201 refers to the physical address [1.1.0.0] included in the CEC message input from the packet processing circuit 203, and is the physical address of the device connected upstream of the wireless transmission device 102. Recognize that. Then, the wireless transmission device 101 transmits a connection request for establishing a forward connection to the wireless transmission device 102.
  • the wireless transmission device 102 that has received the connection request transmits a connection response permitting connection to the wireless transmission device 101.
  • the wireless transmission apparatus 102 reserves a wireless band (HRP) for transmitting video data. Thereafter, the wireless transmission device 102 transmits a stream start notification indicating that the video data stream transmission is started to the wireless transmission device 101.
  • HRP wireless band
  • FIG. 12 shows an example of a sequence for newly establishing a forward connection when a reverse connection for transmitting voice data has already been established. A detailed description of the common points with the sequence already described will be omitted, and the differences will be described in detail.
  • a wireless band (LRP) for transmitting audio data is reserved between the wireless transmission devices 101 and 102, and audio data is transmitted from the video / audio output device 108 to the audio output device 103.
  • the video / audio reproduction device 104 transmits an “Active Source” message in which the physical address [1.1.0.0] is set.
  • the wireless transmission device 101 relays the CEC message received from the wireless transmission device 102 to the video / audio output device 108 and refers to the physical address [1.1.0.0] included in the CEC message, It recognizes that it is the physical address of the device connected upstream of 102.
  • the wireless transmission device 101 transmits a disconnection notification for disconnecting the established reverse connection to the wireless transmission device 102.
  • the wireless transmission device 101 transmits a connection request for establishing a forward connection to the wireless transmission device 102.
  • the wireless transmission device 102 that has received the connection request transmits a connection response permitting connection to the wireless transmission device 101.
  • the wireless transmission device 102 reserves a wireless band (HRP) for transmitting video data.
  • the wireless transmission device 102 transmits a stream start notification indicating that the video data stream transmission is started to the wireless transmission device 101.
  • the video data output from the video / audio reproduction device 104 is transmitted to the video / audio output device 108 via the wireless connection in the forward direction.
  • FIG. 13 is a diagram showing the flow of video data and audio data when a program from a broadcast wave input to the video / audio output device 108 is viewed in the theater mode.
  • FIG. 14 to FIG. 17 are diagrams showing the processing sequence of each device constituting the wireless transmission system.
  • the video data is output from the display 606 of the video / audio output device 108.
  • the audio data output from the video / audio output device 108 is output from the speaker 406 of the audio output device 103 via the wireless transmission device 101 and the wireless transmission device 102.
  • the video / audio output device 108 sets “Physical Source” in which the physical address [0.0.0.0] of the video / audio output device 108 is set in the operand area. Broadcast a message.
  • the video / audio output device 108 broadcasts “Set Stream Path” in which the physical address [0.0.0.0] of the video / audio output device 108 is set in the operand area. Processing for performing reverse connection using these CEC messages will be described with reference to FIGS.
  • FIG. 14 shows an example of a sequence in the case where a “Set Stream Path” message is transmitted from the video / audio output device 108.
  • a detailed description of the common points with the sequence already described will be omitted, and the differences will be described in detail.
  • the wired transmission / reception circuit 602 of the video / audio output device 108 transmits a “Set Stream Path” message to the CEC signal lines of the video / audio transmission cables 109 and 112.
  • the physical address [0.0.0.0] of the video / audio output device 108 serving as the source device is set.
  • the wireless transmission device 101 relays the CEC message received from the video / audio output device 108 to the wireless transmission device 102 and refers to the physical address [0.0.0.0] included in the CEC message, It recognizes that it is not the physical address of the device connected upstream of 102.
  • the controller 201 of the wireless transmission device 101 may confirm whether or not the connection start condition is satisfied.
  • the following connection start conditions (a1) to (d2) may be determined.
  • the connection start conditions (a1) to (d2) can be commonly used in the examples shown in FIGS. 15 to 17 and FIGS. 19 to 22.
  • the wireless transmission device 102 has a wired output function for audio data.
  • the wireless transmission device 102 has a wireless reception function for voice data.
  • the wireless transmission device 101 transmits a device information request signal to the wireless transmission device 102.
  • the wireless transmission device 102 transmits a device information response signal to the wireless transmission device 101.
  • FIG. 29 shows an example of the message format of the device information request signal.
  • an operation code field 801 is a field indicating a message type.
  • a value indicating a device capability request signal is set.
  • the request type field 802 is a field that indicates a requested type by a bitmap.
  • a bit for requesting device information is set to 1.
  • the reserved field 803 is a reserved field for the future.
  • the total message length field 804 is a field in which the total length is set when further sub-messages are included in the message.
  • FIG. 30 shows an example of the message format of the device information response signal.
  • an operation code field 901 is a field indicating a message type.
  • a value indicating a device capability response signal is set.
  • the total message length field 902 is a field in which the total length is set when a sub message is further included in the message.
  • the type field 903 is a field in which the type of the sub message is set.
  • a value indicating a device information message is set.
  • the sub message length field 904 is a field in which the length of the sub message is set.
  • a device type field 905 is a field in which a device type is set.
  • the version field 906 is a field in which the device version is set.
  • the AV type field 907 includes bits corresponding to a video data transmission function, a video data reception function, an audio data transmission function, and an audio data reception function in wireless transmission, and is set to 1 when the device has each function. It is a field.
  • the radio type field 908 is a field in which a radio type is set.
  • the flag field 909 stores flags corresponding to device capabilities such as a wired output function of video data or audio data, a connection state of a video transmission cable or an audio transmission cable, and the flag is set according to the connection state or capability. It is a field.
  • the device information response signal includes information on whether or not the packet wireless transmission / reception circuit 302 of the wireless transmission apparatus 102 has the voice data reception function, and whether the wireless transmission apparatus 102 includes the voice wired transmission circuit 305. Information on whether or not, and the connection state of the audio transmission cable 107 can be included.
  • connection state of the audio transmission cable indicates a connection state indicating whether or not the wireless transmission device 102 is connected to the audio output device 103 via the audio transmission cable 107. Specifically, the connection state is reflected in a specific flag in the flag field 909 when the device information response signal is transmitted.
  • (b2) and (d2) may be combined and the wireless transmission apparatus 102 may notify the wireless transmission apparatus 101 as one flag, for example.
  • a predetermined value is assigned to the combination of the presence / absence of a wired output function of audio data and the connection state of the audio transmission cable 107 between the wireless transmission device 102 and the audio output device 103. it can.
  • information in which (b2), (c2), and (d2) are collected may be stored in the AV type field 907, and the wireless transmission device 102 may notify the wireless transmission device 101.
  • the wireless transmission device 102 may notify the wireless transmission device 101.
  • This can be realized by assigning a predetermined value.
  • the following is a specific example of setting the device information response signal.
  • a value indicating that the wireless transmission apparatus 102 is an adapter is set.
  • each bit corresponding to the video data transmission function, the audio data transmission function, and the audio data reception function is set to 1.
  • the wireless type field 908 a value indicating a wireless type capable of high-speed transmission of video data and audio data and low-speed reception of audio data is set.
  • the flag field 909 1 is set to a flag indicating that the audio cable transmission function is provided and a flag indicating the connection state of the audio transmission cable.
  • the wireless transmission device 101 refers to the device information response signal, and from the information that the wireless transmission device 102 is an adapter, has a voice data reception function, and can receive voice data at low speed, the condition (c2) is satisfied. Make sure you meet. Further, it is confirmed from the flag field 909 that the conditions (b2) and (d2) are satisfied.
  • the controller 201 proceeds to a process of establishing a wireless connection with the wireless transmission apparatus 102 when all the four connection start conditions (a1) to (d2) are satisfied. On the other hand, if any one of the four connection start conditions (a1) to (d2) is not satisfied, the controller 201 completes the process without starting the wireless connection with the wireless transmission device 102. At this time, the controller 201 may transmit the cause of not starting the wireless connection to the video / audio output device 108 and notify the user via the display 606 or the speaker 605 of the video / audio output device 108. For example, if (d1) is not satisfied, a message such as “The audio cable is not connected” or “Please connect the audio cable to the AV amplifier” is displayed on the display 606, Notification is made by voice through the speaker 605.
  • the wireless transmission device 101 transmits a connection request for establishing a reverse connection to the wireless transmission device 102.
  • the wireless transmission device 102 that has received the connection request transmits a connection response permitting connection to the wireless transmission device 101.
  • the wireless transmission device 101 that has received the connection response reserves a wireless band (LRP) for transmitting voice data.
  • LRP wireless band
  • the wireless transmission device 101 transmits a stream start notification indicating that the audio data stream transmission is started to the wireless transmission device 102 using LRP.
  • FIG. 15 shows an example of a sequence for newly establishing a backward connection when a forward connection for transmitting video data has already been established.
  • the content of the DVD inserted in the video / audio reproduction device 104 is viewed in the theater mode
  • the content received by the broadcast wave receiving circuit 607 of the video / audio output device 108 is viewed in the theater mode. Can happen if you start to do.
  • a detailed description of the common points with the sequence already described will be omitted, and the differences will be described in detail.
  • a wireless band (HRP) for transmitting video data is reserved between the wireless transmission devices 101 and 102, and video data is transmitted from the video / audio reproduction device 104 to the video / audio output device 108.
  • the video / audio output device 108 sets “Set Stream Path” in which the physical address [0.0.0.0] is set. Send a message.
  • the wireless transmission device 101 relays the CEC message received from the video / audio output device 108 to the wireless transmission device 102 and refers to the physical address [0.0.0.0] included in the CEC message, It recognizes that it is not the physical address of the device connected upstream of 102.
  • the wireless transmission device 101 transmits a disconnection notification for disconnecting the forward connection to the wireless transmission device 102.
  • the wireless transmission apparatus 102 that has received the disconnection notification performs a bandwidth release process for releasing the reserved bandwidth.
  • the wireless transmission device 101 transmits a connection request for establishing a reverse connection to the wireless transmission device 102.
  • the wireless transmission device 102 that has received the connection request transmits a connection response permitting connection to the wireless transmission device 101.
  • the wireless transmission device 101 that has received the connection response reserves a wireless band (LRP) for transmitting voice data.
  • LRP wireless band
  • the wireless transmission device 101 transmits a stream start notification indicating that the audio data stream transmission is started to the wireless transmission device 102.
  • FIG. 16 shows an example of a sequence in a case where an “Active Source” message is transmitted from the video / audio output device 108.
  • An “Active Source” message is transmitted from the video / audio output device 108.
  • a detailed description of the common points with the sequence already described will be omitted, and the differences will be described in detail.
  • the wired transmission / reception circuit 504 of the video / audio output device 108 transmits an “Active Source” message to the CEC signal lines of the video / audio transmission cables 109 and 112.
  • the physical address [0.0.0.0] of the video / audio output device 108 serving as the source device is set.
  • the wireless transmission device 101 relays the CEC message received from the video / audio output device 108 to the wireless transmission device 102 and refers to the physical address [0.0.0.0] included in the CEC message, It recognizes that it is not the physical address of the device connected upstream of 102. Then, the wireless transmission device 101 transmits a connection request for establishing a reverse connection to the wireless transmission device 102. The wireless transmission device 102 that has received the connection request transmits a connection response permitting connection to the wireless transmission device 101. The wireless transmission device 101 that has received the connection response reserves a wireless band (LRP) for transmitting voice data. Thereafter, the wireless transmission device 101 transmits a stream start notification indicating that the audio data stream transmission is started to the wireless transmission device 102. Through the above processing, the audio data output from the video / audio output device 108 is transmitted to the audio output device 103 via the radio connected in the reverse direction.
  • LRP wireless band
  • FIG. 17 shows an example of a sequence for newly establishing a reverse connection when a forward connection for transmitting video data has already been established. A detailed description of the common points with the sequence already described will be omitted, and the differences will be described in detail.
  • a wireless band (HRP) for transmitting video data is reserved between the wireless transmission devices 101 and 102, and video data is transmitted from the video / audio reproduction device 104 to the video / audio output device 108.
  • the video / audio output device 108 transmits an “Active Source” message in which the physical address [0.0.0.0] is set.
  • the wireless transmission device 101 relays the CEC message received from the video / audio output device 108 to the wireless transmission device 102 and refers to the physical address [0.0.0.0] included in the CEC message, It recognizes that it is not the physical address of the device connected upstream of 102.
  • the wireless transmission device 101 transmits a disconnection notification for disconnecting the forward connection to the wireless transmission device 102.
  • the wireless transmission apparatus 102 that has received the disconnection notification performs a bandwidth release process for releasing the reserved bandwidth.
  • the wireless transmission device 101 transmits a connection request for establishing a reverse connection to the wireless transmission device 102.
  • the wireless transmission device 102 that has received the connection request transmits a connection response permitting connection to the wireless transmission device 101.
  • the wireless transmission device 101 that has received the connection response reserves a wireless band (LRP) for transmitting voice data.
  • LRP wireless band
  • the wireless transmission device 101 transmits a stream start notification indicating that the audio data stream transmission is started to the wireless transmission device 102.
  • FIG. 18 is a diagram showing the flow of video data and audio data when the content reproduced by the video / audio reproduction device 111 is viewed in the theater mode.
  • FIG. 19 to FIG. 22 are diagrams showing the processing sequence of each device constituting the wireless transmission system.
  • the video data output from the video / audio reproduction device 111 is output from the display 606 of the video / audio output device 108.
  • the audio data output from the video / audio reproduction device 111 is output from the speaker 406 of the audio output device 103 via the video / audio output device 108, the wireless transmission device 101, and the wireless transmission device 102.
  • the video / audio reproduction device 111 sets the physical address [2.0.0.0] of the video / audio reproduction device 111 in the operand area. "Broadcast message.
  • the video / audio output device 108 broadcasts a “Set Stream Path” message in which the physical address [2.0.0.0] of the video / audio reproduction device 111 is set in the operand area. Processing for performing reverse connection using these CEC messages will be described with reference to FIGS.
  • FIG. 19 shows an example of a sequence in the case where a “Set Stream Path” message is transmitted from the video / audio output device 108.
  • a detailed description of the common points with the sequence already described will be omitted, and the differences will be described in detail.
  • the video / audio output apparatus 108 transmits a “Set Stream Path” message in which a physical address [2.0.0.0] is set.
  • the wireless transmission device 101 relays the CEC message received from the video / audio output device 108 to the wireless transmission device 102, and refers to the physical address [2.0.0.0] included in the CEC message. It recognizes that it is not the physical address of the device connected upstream of 102.
  • the wireless transmission device 101 transmits a connection request for establishing a reverse connection to the wireless transmission device 102.
  • the wireless transmission device 102 that has received the connection request transmits a connection response permitting connection to the wireless transmission device 101.
  • the wireless transmission device 101 that has received the connection response reserves a wireless band (LRP) for transmitting voice data.
  • LRP wireless band
  • the wireless transmission device 101 transmits a stream start notification indicating that the audio data stream transmission is started to the wireless transmission device 102.
  • the audio data output from the video / audio reproduction device 111 is transmitted to the audio output device 103 via the radio connected in the reverse direction.
  • FIG. 20 shows an example of a sequence for newly establishing a backward connection when a forward connection for transmitting video data has already been established.
  • a DVD content inserted in the video / audio reproduction device 104 is viewed in the theater mode, the content recorded on the HDD (Hard Disk Drive) of the video / audio reproduction device 111 is displayed in the theater. This can happen when you start watching in mode.
  • HDD Hard Disk Drive
  • a wireless band (HRP) for transmitting video data is reserved between the wireless transmission devices 101 and 102, and video data is transmitted from the video / audio reproduction device 104 to the video / audio output device 108.
  • the video / audio output device 108 sets the physical address [2.0.0.0] to “Set Stream Path”. Send a message.
  • the wireless transmission device 101 relays the CEC message received from the video / audio output device 108 to the wireless transmission device 102, and refers to the physical address [2.0.0.0] included in the CEC message. It recognizes that it is not the physical address of the device connected upstream of 102.
  • the wireless transmission device 101 transmits a disconnection notification for disconnecting the forward connection to the wireless transmission device 102.
  • the wireless transmission device 102 that has received the disconnection notification performs a bandwidth release process for releasing the reserved wireless bandwidth (HRP).
  • the wireless transmission device 101 transmits a connection request for establishing a reverse connection to the wireless transmission device 102.
  • the wireless transmission device 102 that has received the connection request transmits a connection response permitting connection to the wireless transmission device 101.
  • the wireless transmission device 101 that has received the connection response reserves a wireless band (LRP) for transmitting voice data.
  • LRP wireless band
  • the wireless transmission device 101 transmits a stream start notification indicating that the audio data stream transmission is started to the wireless transmission device 102.
  • FIG. 21 shows an example of a sequence in the case where the “Active Source” message is transmitted from the video / audio reproduction device 111.
  • a detailed description of the common points with the sequence already described will be omitted, and the differences will be described in detail.
  • the wired transmission / reception circuit 504 of the video / audio reproduction device 111 transmits an “Active Source” message to the CEC signal line of the video / audio transmission cable 112.
  • the physical address [2.0.0.0] of the video / audio reproduction device 111 as the source device is set.
  • the CEC message is relayed by the video / audio output device 108 and reaches the wireless transmission device 101.
  • the wireless transmission device 101 relays the CEC message received from the video / audio output device 108 to the wireless transmission device 102, and refers to the physical address [2.0.0.0] included in the CEC message. It recognizes that it is not the physical address of the device connected upstream of 102. Then, the wireless transmission device 101 transmits a connection request for establishing a reverse connection to the wireless transmission device 102. The wireless transmission device 102 that has received the connection request transmits a connection response permitting connection to the wireless transmission device 101. The wireless transmission device 101 that has received the connection response reserves a wireless band (LRP) for transmitting voice data. Thereafter, the wireless transmission device 101 transmits a stream start notification indicating that the audio data stream transmission is started to the wireless transmission device 102. Through the above processing, the audio data output from the video / audio reproduction device 111 is transmitted to the audio output device 103 via the radio connected in the reverse direction.
  • LRP wireless band
  • FIG. 22 shows an example of a sequence for newly establishing a backward connection when a forward connection for transmitting video data has already been established. A detailed description of the common points with the sequence already described will be omitted, and the differences will be described in detail.
  • a wireless band (HRP) for transmitting video data is reserved between the wireless transmission devices 101 and 102, and video data is transmitted from the video / audio reproduction device 104 to the video / audio output device 108.
  • the video / audio reproduction device 111 transmits an “Active Source” message in which the physical address [2.0.0.0] is set.
  • the wireless transmission device 101 relays the CEC message received from the video / audio output device 108 to the wireless transmission device 102, and refers to the physical address [2.0.0.0] included in the CEC message. It recognizes that it is not the physical address of the device connected upstream of 102.
  • the wireless transmission device 101 transmits a disconnection notification for disconnecting the forward connection to the wireless transmission device 102.
  • the wireless transmission device 102 that has received the disconnection notification performs a bandwidth release process for releasing the reserved wireless bandwidth (HRP).
  • the wireless transmission device 101 transmits a connection request for establishing a reverse connection to the wireless transmission device 102.
  • the wireless transmission device 102 that has received the connection request transmits a connection response permitting connection to the wireless transmission device 101.
  • the wireless transmission device 102 that has received the connection response reserves a wireless band (LRP) for transmitting voice data.
  • the wireless transmission device 102 transmits a stream start notification indicating that the audio data stream transmission is started to the wireless transmission device 101.
  • LRP wireless band
  • FIG. 23 is a diagram illustrating an example of a flowchart of the disconnection process of the controller 201 of the wireless transmission device 101.
  • the controller 201 of the wireless transmission apparatus 101 acquires the signal level of the HPD signal line of the video / audio transmission cable 109 from the wired transmission / reception circuit 204 (S2302). ).
  • the controller 201 performs a disconnection process with the wireless transmission device 102 (S2303).
  • the disconnection process is a process for transmitting a disconnection notification to the wireless transmission apparatus 102 and releasing the reserved bandwidth.
  • the controller 201 ends the process.
  • the speaker 605 and the display 606 are built in the device, but the speaker and the display are not built in unlike the STB (Set Top Box), and the externally installed speaker and It may be connected to a display.
  • a wired transmission / reception circuit is connected to the video / audio processing circuit instead of the speaker and the display, and the external audio / video signal is connected to the external speaker / display via the wired transmission / reception circuit, the video / audio transmission cable, and the audio transmission cable.
  • the audio output device may be connected to a speaker outside the device without incorporating a speaker. Two or more speakers may be connected to the audio output device.
  • FIG. 25 is a block diagram illustrating a configuration example of a wireless communication system that transmits audio data using the audio data wireless transmission method according to the second embodiment of the present invention. A detailed description of the common points with the first embodiment will be omitted, and the differences will be mainly described.
  • a video / audio output device 701 is a device capable of outputting video data and audio data such as a TV.
  • the wireless transmission device 102 is a device that can transmit and receive video data and audio data using wireless communication.
  • the audio output device 103 is a device that can output audio data such as an AV amplifier.
  • the video / audio reproduction device 104 is a device capable of reproducing video data and audio data and outputting them to other devices.
  • the video / audio transmission cable 105 and the video / audio transmission cable 106 are cables capable of transmitting video data and audio data, such as an HDMI (High Definition Multimedia Interface) cable.
  • the audio transmission cable 107 is a cable capable of transmitting audio data, such as an SPDIF (Sony Philips Digital Interface) cable.
  • the wireless communication system has two output forms (theater mode and normal mode) for outputting audio data.
  • the theater mode is a mode in which audio data is output from a speaker outside the video / audio output device 701 that outputs video data.
  • the normal mode is a mode in which audio data is also output from the video / audio output device 701 that outputs video data.
  • voice output apparatus 103 is applied to each following embodiment.
  • FIG. 26 is a block diagram illustrating a configuration example of the video / audio output device 701 according to the second embodiment.
  • the video / audio output device 701 includes a packet radio transmission / reception circuit 202 having an antenna 206, a packet processing circuit 203, a video / audio processing circuit 604, a speaker 605, a display 606, and a broadcast wave receiving circuit 607. And a controller 201 that controls the operation of these circuits 202, 203, 604, and 607. That is, the video / audio output device 701 corresponds to a configuration in which the wireless transmission device 101 and the video / audio output device 108 according to the first embodiment are integrated.
  • the packet radio transmission / reception circuit 202 demodulates the radio signal received via the antenna 206 into a baseband signal, and then outputs it to the packet processing circuit 203.
  • the packet processing circuit 203 decodes a received packet by extracting only video data, audio data, and a predetermined control command from a baseband signal input from the packet radio transmission / reception circuit 202 by a predetermined packet separation process. And the audio data are output to the video / audio processing circuit 604, while the control command is output to the controller 201.
  • the video / audio processing circuit 604 outputs the video data and audio data input from the packet processing circuit 203 or only the video data to the display 606 for display after executing predetermined signal processing and D / A conversion processing. Further, in the normal mode, the video / audio processing circuit 604 outputs the input audio data to the speaker 605 after executing predetermined signal processing and D / A conversion processing under the control of the controller 201. On the other hand, in the theater mode, the video / audio processing circuit 604 does not output audio data to the speaker 605 according to the control of the controller 201.
  • the broadcast wave receiving circuit 607 receives the broadcast wave, executes predetermined signal processing, and then outputs video data and audio data to the video / audio processing circuit 604.
  • the video / audio processing circuit 604 performs predetermined signal processing and D / A conversion processing on the video data, and then outputs and displays the video data on the display 606.
  • the video / audio processing circuit 604 performs predetermined signal processing and D / A conversion processing on the input audio data according to the control of the controller 201, and then outputs the audio data to the speaker 605 to output the audio data.
  • the audio / video processing circuit 604 outputs audio data to the packet processing circuit 203 without performing audio output to the speaker 605 according to the control of the controller 201.
  • the packet processing circuit 203 converts the input audio data into a digital signal in a predetermined packet format and outputs the digital signal to the packet radio transmission / reception circuit 202.
  • the packet radio transmission / reception circuit 202 digitally modulates the carrier wave signal according to the digital signal input from the packet processing circuit 203 and wirelessly transmits the modulated radio signal to the radio transmission apparatus 102 via the antenna 206.
  • the controller 201 receives a wireless signal via the antenna 206 and receives a broadcast wave.
  • the controller 201 transmits the packet wireless transmission / reception circuit 202, the packet processing circuit 203, the video / audio processing circuit 604, and the broadcast wave reception circuit.
  • the control data is exchanged with 607 and each control is performed.
  • FIG. 27 to FIG. 27 show the processing when the input switching of the video / audio output device 701 is performed so that the user can watch the program from the broadcast wave input to the video / audio output device 701 when using the video / audio output device 701. 30 will be used for explanation.
  • FIG. 27 is a flowchart showing a connection process performed by the controller 201 of the video / audio output device 701.
  • step S2701 when the controller 201 detects that an input switching operation from the video / audio reproduction device 104 to the broadcast wave has been performed on the video / audio output device 701 by the user, the process proceeds to step S2702.
  • the detection of the input switching operation is not the gist of the present invention, any method may be used. For example, this is performed by a signal output to the controller 201 from an operation receiving unit (not shown).
  • step S2702 the controller 201 controls the packet processing circuit 203, the packet wireless transmission / reception circuit 202, and the antenna 206 to transmit a wireless communication disconnection notification signal to the wireless transmission device 102, and the process proceeds to step S2703.
  • step S2703 the controller 201 controls the packet processing circuit 203, the packet wireless transmission / reception circuit 202, and the antenna 206 to perform a bandwidth release process of the transmission band used in wireless communication with the wireless transmission device 102, The process proceeds to step S2704.
  • step S2704 the controller 201 determines whether or not a connection start condition is satisfied. As a connection start condition, the controller 201 confirms the following four items (a1) to (d3).
  • the wireless transmission device 102 has a wired output function of audio data.
  • the wireless transmission device 102 has a wireless reception function for voice data.
  • a control signal is exchanged between the controller 201 of the audio / video output apparatus 701 and the controller 401 of the audio output apparatus 103 to determine whether to operate in the theater mode or the normal mode. Is done.
  • the controller 201 of the video / audio output device 701 stores whether the current operation mode is the theater mode or the normal mode. For example, the operation mode is set by the user.
  • the controller 401 of the audio output device 103 acquires the operation mode from the controller 201 of the video / audio output device 701.
  • FIG. 28 is a diagram showing a sequence when the video / audio output device 701 acquires device information such as whether or not the wireless transmission device 102 includes the audio wired transmission circuit 305.
  • the video / audio output device 701 transmits a device information request signal to the wireless transmission device 102.
  • the wireless transmission apparatus 102 transmits a device information response signal to the video / audio output apparatus 701.
  • FIG. 29 shows an example of the message format of the device information request signal.
  • an operation code field 801 is a field indicating a message type.
  • a value indicating a device capability request signal is set.
  • the request type field 802 is a field that indicates a requested type by a bitmap.
  • a bit for requesting device information is set to 1.
  • the reserved field 803 is a reserved field for the future.
  • the total message length field 804 is a field in which the total length is set when further sub-messages are included in the message.
  • FIG. 30 shows an example of the message format of the device information response signal.
  • an operation code field 901 is a field indicating a message type.
  • a value indicating a device capability response signal is set.
  • the total message length field 902 is a field in which the total length is set when a sub message is further included in the message.
  • the type field 903 is a field in which the type of the sub message is set.
  • a value indicating a device information message is set.
  • the sub message length field 904 is a field in which the length of the sub message is set.
  • a device type field 905 is a field in which a device type is set.
  • the version field 906 is a field in which the device version is set.
  • the AV type field 907 includes bits corresponding to a video data transmission function, a video data reception function, an audio data transmission function, and an audio data reception function in wireless transmission, and is set to 1 when the device has each function. It is a field.
  • the radio type field 908 is a field in which a radio type is set.
  • the flag field 909 is a field in which flags corresponding to the capabilities of the device such as a wired output function of audio data and a connection state of an audio transmission cable are stored, and the flag is set according to the connection state and capability.
  • the device information response signal includes information on whether or not the packet wireless transmission / reception circuit 302 of the wireless transmission apparatus 102 has the voice data reception function, and whether the wireless transmission apparatus 102 includes the voice wired transmission circuit 305.
  • Information on whether or not the audio transmission cable 107 is connected can be included.
  • connection state of the audio transmission cable 107 monitors the connection state indicating whether or not the wireless transmission apparatus 102 is connected to the audio output apparatus 103 via the audio transmission cable 107, and the flag field when the device information response signal is transmitted.
  • the connection state is reflected in a specific flag in 909.
  • (b3) and (d3) may be combined and the wireless transmission apparatus 102 may notify the video / audio output apparatus 701 as one flag, for example.
  • a predetermined value is assigned to the combination of the presence / absence of a wired output function of audio data and the connection state of the audio transmission cable 107 between the wireless transmission device 102 and the audio output device 103. it can.
  • information in which (b3), (c3), and (d3) are collected may be stored in the AV type field 907, and the wireless transmission apparatus 102 may notify the video / audio output apparatus 701.
  • the wireless transmission apparatus 102 may notify the video / audio output apparatus 701.
  • This can be realized by assigning a predetermined value.
  • the following is a specific example of setting the device information response signal.
  • a value indicating that the wireless transmission apparatus 102 is an adapter is set.
  • each bit corresponding to the video data transmission function, the audio data transmission function, and the audio data reception function is set to 1.
  • the wireless type field 908 a value indicating a wireless type capable of high-speed transmission of video data and audio data and low-speed reception of audio data is set.
  • the flag field 909 1 is set to a flag indicating that the audio cable transmission function is provided and a flag indicating the connection state of the audio transmission cable.
  • the video / audio output device 701 refers to the device information response signal, and from the information that the wireless transmission device 102 is an adapter and has a reception function of the audio data, and can receive the audio data at a low speed. Confirm that the conditions are met. Further, it is confirmed from the flag field 909 that the conditions (b3) and (d3) are satisfied.
  • the controller 201 When the controller 201 satisfies all the four connection start conditions (a1) to (d3), the controller 201 controls the packet processing circuit 203, the packet wireless transmission / reception circuit 202, and the antenna 206 to communicate with the wireless transmission device 102. Wireless connection is started, and the process proceeds to step S2705. Further, when any one of the four connection start conditions (a1) to (d3) is not satisfied, the controller 201 completes the process without starting the wireless connection with the wireless transmission device 102.
  • the controller 201 may control the video / audio processing circuit 604 to notify the user of the cause of not starting the wireless connection through the display 606 or the speaker 605. For example, if (d3) is not satisfied, a message such as “The audio cable is not connected” or “Please connect the audio cable to the AV amplifier” is displayed on the display 606, Notification is made by voice through the speaker 605.
  • step S2705 the controller 201 controls the packet processing circuit 203, the packet radio transmission / reception circuit 202, and the antenna 206 to transmit a radio connection request signal to the radio transmission apparatus 102, and the process proceeds to step S2706.
  • step S ⁇ b> 2706 the controller 201 waits until a connection response (permission) signal for permitting connection is received from the wireless transmission apparatus 102.
  • the controller 201 receives a connection response (permission) signal from the wireless transmission device 102 via the antenna 206, the packet wireless transmission / reception circuit 202, and the packet processing circuit 203, the process proceeds to step S2707.
  • the controller 201 does not receive a connection response signal for a certain period or receives a connection response (rejection) signal indicating connection rejection from the wireless transmission apparatus 102, the controller 201 completes the processing.
  • step S2707 the controller 201 controls the packet processing circuit 203, the packet radio transmission / reception circuit 202, and the antenna 206 to perform band reservation processing and reserve a band or time for transmitting voice data.
  • the process proceeds to step S2708.
  • step S ⁇ b> 2708 the controller 201 controls the packet processing circuit 203, the packet radio transmission / reception circuit 202, and the antenna 206 to transmit a stream start notification signal indicating that transmission of audio data is started to the radio transmission apparatus 102.
  • step S ⁇ b> 2709 the controller 201 transmits the audio signal received by the broadcast wave receiving circuit 607 to the wireless transmission device 102, so that the broadcast wave receiving circuit 607, the video / audio processing circuit 604, the packet processing circuit 203, and the packet radio transmission / reception circuit. 202 is controlled.
  • FIG. 31 is a flowchart of the connection process of the controller 301 of the wireless transmission apparatus 102.
  • step S3101 when the controller 301 receives a connection request signal from the video / audio output device 701 via the antenna 306, the packet radio transmission / reception circuit 302, and the packet processing circuit 303, the process proceeds to step S3102.
  • step S3102 the controller 301 confirms whether or not the connection permission condition is satisfied. As connection permission conditions, the following two items (a2) and (d4) are confirmed.
  • the wireless transmission device 102 is connected to the audio output device 103 via the audio transmission cable 107.
  • (A2) like (a1), exchanges control signals between the audio / video output device 701 and the audio output device 103, and determines whether to operate in the theater mode or the normal mode. Note that in the video / audio output device 701, when (a1) is confirmed, it is not always necessary to confirm (a2). Also, (d4) is confirmed by the controller 301 inquiring whether the audio transmission cable 107 is connected to the audio wired transmission circuit 305. When (d4) is confirmed, it is not always necessary to confirm (d3).
  • connection start conditions (a2) and (d4) are satisfied, the controller 301 proceeds to S3103 and controls the packet processing circuit 303, the packet radio transmission / reception circuit 302, and the antenna 306 to connect response (permission). ) The signal is transmitted to the video / audio output device 701. On the other hand, if any one of the connection start conditions (a2) and (d4) is not satisfied, the controller 301 proceeds to step S3104. In step S 3104, the controller 301 controls the packet processing circuit 303, the packet radio transmission / reception circuit 302, and the antenna 306 to transmit a connection response (rejection) signal to the video / audio output device 701.
  • FIG. 32 is a diagram showing a sequence of the entire system when the entire system is operating in the theater mode and connection is permitted.
  • the input of the video / audio output device 701 is the video / audio reproduction device 104.
  • the video data and audio data reproduced by the video / audio reproduction circuit 502 are subjected to signal processing in the video / audio processing circuit 503 according to the control of the controller 501, and are transmitted via the wired transmission / reception circuit 504. It is output to the audio output device 103.
  • audio data input to the wired transmission / reception circuit 402 is output from the speaker 406 via the video / audio processing circuit 403 under the control of the controller 401, and the video data is output from the video / audio processing circuit 403 and the wired
  • the data is output to the wireless transmission device 102 via the transmission / reception circuit 404.
  • the wireless transmission device 102 the video data input from the audio output device 103 is input via the wired transmission / reception circuit 304, and the packet processing circuit 303, the packet wireless transmission / reception circuit 302, and the antenna 306 are controlled according to the control of the controller 301. Via wireless transmission to the video / audio output device 701.
  • video data received via the antenna 206 and the packet wireless transmission / reception circuit 202 is output to the display 606 via the packet processing circuit 203 and the video / audio processing circuit 604 according to the control of the controller 201.
  • the audio output device 103 may transmit audio data together with video data to the wireless transmission device 102.
  • the controller 201 of the video / audio output device 701 puts the video / audio output device 701 into a mute state and controls the video / audio processing circuit 604 so that no audio is output from the speaker 605.
  • the input of the video / audio output device 701 is switched from the video / audio reproduction device 104 to a broadcast wave by the user.
  • the video / audio output device 701 transmits a disconnection notification signal to the wireless transmission device 102.
  • the wireless transmission device 102 receives the disconnection notification signal and disconnects the wireless communication with the video / audio output device 701. Thereafter, the video / audio output device 701 performs a bandwidth release process for the bandwidth reserved for wireless communication with the wireless transmission device 102.
  • the video / audio output device 701 confirms the connection start condition and confirms that all the conditions (a1) to (d3) are satisfied.
  • the video / audio output device 701 transmits a connection request signal to the wireless transmission device 102.
  • the video / audio output device 701 does not transmit a connection signal to the wireless transmission device 102.
  • the wireless transmission device 102 When the wireless transmission device 102 receives the connection request signal, it confirms that all the connection start conditions (a4) and (d4) are satisfied. If all the connection start conditions (a4) and (d4) are satisfied, a connection response (permission) signal is transmitted to the video / audio output device 701. When receiving the connection response (permission), the video / audio output device 701 performs a bandwidth reservation process for securing a bandwidth necessary for wireless communication, and then transmits a stream start notification signal to the wireless transmission device 102 and wirelessly transmits the audio data. Transmit to the transmission apparatus 102. The wireless transmission device 102 outputs the received audio data to the audio output device 103, and the audio output device 103 outputs audio data from the speaker 406.
  • FIG. 33 is a flowchart of connection processing performed in the video / audio output device 701.
  • the audio output device 103 and the wireless transmission device 102 are connected by the video / audio transmission cable 106 and the audio transmission cable 107.
  • the communication path is capable of transmitting video data and audio data.
  • a single cable having both a communication path capable of transmitting audio data.
  • a determination is made using the connection status of the one cable instead of the audio transmission cable 107.
  • the one cable is an HDMI cable, it is possible to determine the connection status in the state of a 5V signal.
  • FIG. 34 is a block diagram showing a configuration of a radio communication system that transmits audio data using the audio data transmission method according to the third embodiment of the present invention.
  • the difference between the second embodiment and the third embodiment is that the wireless processing unit is independent of the video / audio output device 701 in the second embodiment, and the wireless transmission device 101 and the video / audio output device 108 are configured. It is that.
  • a video / audio output device 108 is a device capable of video output and audio output, such as a TV.
  • the video / audio transmission cable 109 is a cable capable of transmitting video data and audio data, such as an HDMI cable.
  • the audio transmission cable 110 is a cable capable of transmitting audio data such as an SPDIF cable.
  • the wireless transmission device 102, the audio output device 103, and the video / audio reproduction device 104 are the same as those in the second embodiment, the description thereof is omitted.
  • the wireless transmission device 101 and the video / audio output device 108 are the same as those in the first embodiment, and thus the description thereof is omitted.
  • the audio output device 103 and the wireless transmission device 102 are connected by the video / audio transmission cable 106 and the audio transmission cable 107.
  • the communication path is capable of transmitting video data and audio data.
  • a single cable having both a communication path capable of transmitting audio data.
  • a determination is made using the connection status of the one cable instead of the audio transmission cable 107.
  • the one cable is an HDMI cable, it is possible to determine the connection status in a 5V signal state.
  • the video / audio output device 108 and the wireless transmission device 101 are connected by the video / audio transmission cable 109 and the audio transmission cable 110.
  • communication capable of transmitting video data and audio data is possible. It is also possible to realize with a single cable having both a path and a communication path capable of transmitting audio data.
  • the controller 601 When the controller 601 detects that the input has been switched to the broadcast wave, the controller 601 wirelessly transmits a switching notification signal indicating that the input has been switched to the broadcast wave via the wired transmission / reception circuit 602 and the video / audio transmission cable 109. Send to device 101.
  • the switching detection method is the same as in the second embodiment.
  • the controller 201 receives the switching notification signal from the video / audio output device 108 via the wired transmission / reception circuit 204 and the packet processing circuit 203, and switches the input of the video / audio output device 108 to a broadcast wave. Recognize that
  • the wireless transmission device 101 determines whether the entire system is operating in the theater mode with reference to a control signal exchanged between the audio / video output device 108 and the audio output device 103.
  • the other connection processing of the wireless transmission device 101 is the same as that in the flowchart shown in FIG.
  • the processing of the wireless transmission apparatus 102 is the same as the flowchart shown in FIG.
  • the video / audio output device 108 of the present invention includes the speaker 605 and the display 606, but may not be built like STV (Set Top Box) and may be installed outside.
  • a wired transmission / reception circuit is connected to the video / audio processing circuit 604 instead of the speaker 605 and the display 606, and is connected to an external speaker / display via the wired transmission / reception circuit, the video / audio transmission cable, the audio transmission cable, and the like.
  • the audio output device 103 may not be built in the speaker 406 but may be connected to a speaker outside the device. Two or more speakers 406 may be connected to the audio output device 103.
  • Each of the above devices is specifically a computer system including a microprocessor, ROM, RAM, a hard disk unit, a display unit, a keyboard, a mouse, and the like.
  • a computer program is stored in the RAM or the hard disk unit.
  • Each device achieves its functions by the microprocessor operating according to the computer program.
  • the computer program is configured by combining a plurality of instruction codes indicating instructions for the computer in order to achieve a predetermined function.
  • the system LSI is a super multifunctional LSI manufactured by integrating a plurality of components on one chip, and specifically, a computer system including a microprocessor, a ROM, a RAM, and the like. .
  • a computer program is stored in the RAM.
  • the system LSI achieves its functions by the microprocessor operating according to the computer program.
  • the constituent elements constituting each of the above devices may be constituted by an IC card or a single module that can be attached to and detached from each device.
  • the IC card or module is a computer system that includes a microprocessor, ROM, RAM, and the like.
  • the IC card or the module may include the super multifunctional LSI described above.
  • the IC card or the module achieves its functions by the microprocessor operating according to the computer program. This IC card or this module may have tamper resistance.
  • the present invention may be the method described above. Further, the present invention may be a computer program that realizes these methods by a computer, or may be a digital signal composed of a computer program.
  • the present invention also relates to a computer-readable recording medium capable of reading a computer program or a digital signal, such as a flexible disk, hard disk, CD-ROM, MO, DVD, DVD-ROM, DVD-RAM, BD (Blu-ray Disc), It may be recorded in a semiconductor memory or the like. Further, it may be a digital signal recorded on these recording media.
  • a computer-readable recording medium capable of reading a computer program or a digital signal, such as a flexible disk, hard disk, CD-ROM, MO, DVD, DVD-ROM, DVD-RAM, BD (Blu-ray Disc), It may be recorded in a semiconductor memory or the like. Further, it may be a digital signal recorded on these recording media.
  • the present invention may transmit a computer program or a digital signal via an electric communication line, a wireless or wired communication line, a network represented by the Internet, a data broadcast, or the like.
  • the present invention may be a computer system including a microprocessor and a memory.
  • the memory may store the computer program, and the microprocessor may operate according to the computer program.
  • program or digital signal may be recorded on a recording medium and transferred, or the program or digital signal may be transferred via a network or the like, and may be implemented by another independent computer system.
  • the wireless transmission method since the wireless connection mode between the audio / video output apparatus and the audio output apparatus is automatically selected, the convenience for the user can be improved. .
  • the wireless transmission method according to the present invention can be used particularly for video / audio data transmission in a wireless transmission system compliant with a wireless communication standard such as wireless HD.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Information Transfer Between Computers (AREA)
  • Computer And Data Communications (AREA)

Abstract

La présente invention concerne un procédé de transmission sans fil comprenant des étapes de réception (S702 à S703) permettant de recevoir un message d'identification de position indiquant une position d'un dispositif source ; et des étapes de choix de mode de liaison (S704 à S706) permettant, en fonction de la position d'un dispositif source indiquée dans le message d'identification de position, de choisir le mode de liaison entre des premier et second dispositifs de transmission sans fil et de se connecter dans le mode de liaison choisi. Lors de l'étape du choix du mode de liaison, si le dispositif source se trouve du côté du second dispositif de transmission sans fil ("oui" à l'étape S704), une liaison est établie (S706) dans un premier mode de liaison sans fil pour transmettre sans fil des données vidéo au premier dispositif de transmission sans fil à partir du second dispositif de transmission sans fil, et si le dispositif source se trouve du côté du premier dispositif de transmission sans fil ("non" à l'étape S704), une liaison est établie (S705) dans un second mode de liaison sans fil pour transmettre sans fil des données audio au second dispositif de transmission sans fil à partir du premier dispositif de transmission sans fil.
PCT/JP2010/006104 2009-10-22 2010-10-14 Procédé de transmission sans fil, dispositif de transmission sans fil, système de transmission sans fil, programme et circuit intégré Ceased WO2011048778A1 (fr)

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JP2011537122A JP5560282B2 (ja) 2009-10-22 2010-10-14 無線伝送方法、無線伝送装置、無線伝送システム、プログラム、及び集積回路
US13/201,730 US8365232B2 (en) 2009-10-22 2010-10-14 Method, device, system, program, and integrated circuit for wireless transmission

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JP2009-242999 2009-10-22
JP2009242999 2009-10-22
JP2010-066509 2010-03-23
JP2010066509 2010-03-23

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